/**
 * Retry/backoff dos AI jobs (agente.md secao 108): "retry, exponential
 * backoff, dead-letter strategy, limitar tentativas" — nunca retry
 * infinito.
 */
const BASE_DELAY_MS = 30_000; // 30s
const MAX_DELAY_MS = 30 * 60_000; // 30min

/** Backoff exponencial com teto — 2^attempt * base, nunca passa do teto. */
export function computeBackoffDelayMs(attemptCount: number): number {
  const delay = BASE_DELAY_MS * 2 ** Math.max(0, attemptCount - 1);
  return Math.min(delay, MAX_DELAY_MS);
}

export function computeNextScheduledAt(attemptCount: number, now: Date = new Date()): Date {
  return new Date(now.getTime() + computeBackoffDelayMs(attemptCount));
}

/** Secao 108: "limitar tentativas" — dead-letter (FAILED terminal) quando
 * esgotar. */
export function isDeadLetter(attemptCount: number, maxAttempts: number): boolean {
  return attemptCount >= maxAttempts;
}